Reference:Height Field - Revision history

Jr: fix wording

2025-05-09T11:11:13Z

fix wording

Jholsenback: technical correction: type iff currently not supported

2018-02-04T19:26:59Z

technical correction: type iff currently not supported

Jholsenback: version changes

2017-06-26T10:29:12Z

version changes

Jholsenback: indexentry additions

2016-10-13T10:48:11Z

indexentry additions

Jholsenback: 3.7.1 updates

2016-10-13T09:48:18Z

3.7.1 updates

Jholsenback: technical corrections

2013-03-24T17:07:12Z

technical corrections

Jholsenback: technical corrections

2013-02-08T02:00:36Z

technical corrections

Jholsenback: technical corrections

2013-02-08T01:34:17Z

technical corrections

Jholsenback: 1 revision: underscore link repair

2012-07-17T18:09:19Z

1 revision: underscore link repair

Jholsenback: still testing that theory

2012-07-16T12:12:39Z

still testing that theory

@@ Line 199: / Line 199: @@
 fields (i.e. low resolution images). You may optionally use a boolean value
 such as <code>hierarchy on</code> or <code>hierarchy off</code>.</p>
-<p>While POV-Ray will normally interpret the height field input file as a container of linear data irregardless of file type, this can be overridden for any individual height field input file by specifying <code>gamma</code> GAMMA immediately after the file name. For example:</p>
+<p>While POV-Ray will normally interpret the height field input file as a container of linear data irrespective of file type, this can be overridden for any individual height field input file by specifying <code>gamma</code> GAMMA immediately after the file name. For example:</p>
 <pre>
 height field {

@@ Line 31: / Line 31: @@
+     }
 HF_TYPE:
-   exr | gif | hdr | iff | jpeg | pgm | png | pot | ppm | sys | tga | tiff
+   exr | gif | hdr | jpeg | pgm | png | pot | ppm | sys | tga | tiff
 GAMMA:
    Float_Value | srgb | bt709 | bt2020

@@ Line 207: / Line 207: @@
 {{#indexentry:bt709, keyword}}
 {{#indexentry:bt2020, keyword}}
-<p>This will cause POV-Ray to perform gamma adjustment or decoding on the input file data before building the height field. Alternatively to a numerical value, <code>srgb</code> may be specified to denote that the file format is pre-corrected or encoded using the ''sRGB transfer function'' instead of a power-law gamma function. {{New}} in version 3.7.1, other valid special values are <code>bt709</code> and <code>bt2020</code>, denoting that the file is encoded or pre-corrected using the ITU-R BT.709 or BT.2020 transfer function, respectively. See section [[Documentation:Tutorial Section 3.3#Gamma Handling|Gamma Handling]] for more details.</p>
+<p>This will cause POV-Ray to perform gamma adjustment or decoding on the input file data before building the height field. Alternatively to a numerical value, <code>srgb</code> may be specified to denote that the file format is pre-corrected or encoded using the ''sRGB transfer function'' instead of a power-law gamma function. {{New}} in version 3.8, other valid special values are <code>bt709</code> and <code>bt2020</code>, denoting that the file is encoded or pre-corrected using the ITU-R BT.709 or BT.2020 transfer function, respectively. See section [[Documentation:Tutorial Section 3.3#Gamma Handling|Gamma Handling]] for more details.</p>
 <p>The height field object also allows for substituting a [[Reference:Function Pattern|user defined function]] instead of specifying an image. That function can either be in it's literal form, or it can be a call to a function that you have predeclared. The user supplied parameters <code>FieldResolution_X</code> and <code>FieldResolution_Y</code> are integer values that affect the resolution of the color/index values, <em>not</em> size of the unscaled height field.</p>

@@ Line 205: / Line 205: @@
+   }
 </pre>
 <p>This will cause POV-Ray to perform gamma adjustment or decoding on the input file data before building the height field. Alternatively to a numerical value, <code>srgb</code> may be specified to denote that the file format is pre-corrected or encoded using the ''sRGB transfer function'' instead of a power-law gamma function. {{New}} in version 3.7.1, other valid special values are <code>bt709</code> and <code>bt2020</code>, denoting that the file is encoded or pre-corrected using the ITU-R BT.709 or BT.2020 transfer function, respectively. See section [[Documentation:Tutorial Section 3.3#Gamma Handling|Gamma Handling]] for more details.</p>
 <p>The height field object also allows for substituting a [[Reference:Function Pattern|user defined function]] instead of specifying an image. That function can either be in it's literal form, or it can be a call to a function that you have predeclared. The user supplied parameters <code>FieldResolution_X</code> and <code>FieldResolution_Y</code> are integer values that affect the resolution of the color/index values, <em>not</em> size of the unscaled height field.</p>

@@ Line 32: / Line 32: @@
 HF_TYPE:
    exr | gif | hdr | iff | jpeg | pgm | png | pot | ppm | sys | tga | tiff
 HF_FUNCTION:
    function FieldResolution_X, FieldResolution_Y { UserDefined_Function }
@@ Line 203: / Line 205: @@
+   }
 </pre>
-<p>This will cause POV-Ray to perform gamma adjustment or -decoding on the input file data before building the height field. Alternatively to a numerical value, <code>srgb</code> may be specified to denote that the file format is pre-corrected or encoded using the ''sRGB transfer function'' instead of a power-law gamma function. See the section [[Documentation:Tutorial Section 3.3#Gamma Handling|Gamma Handling]] for more information.</p>
+<p>This will cause POV-Ray to perform gamma adjustment or decoding on the input file data before building the height field. Alternatively to a numerical value, <code>srgb</code> may be specified to denote that the file format is pre-corrected or encoded using the ''sRGB transfer function'' instead of a power-law gamma function. {{New}} in version 3.7.1, other valid special values are <code>bt709</code> and <code>bt2020</code>, denoting that the file is encoded or pre-corrected using the ITU-R BT.709 or BT.2020 transfer function, respectively. See section [[Documentation:Tutorial Section 3.3#Gamma Handling|Gamma Handling]] for more details.</p>
 <p>The height field object also allows for substituting a [[Reference:Function Pattern|user defined function]] instead of specifying an image. That function can either be in it's literal form, or it can be a call to a function that you have predeclared. The user supplied parameters <code>FieldResolution_X</code> and <code>FieldResolution_Y</code> are integer values that affect the resolution of the color/index values, <em>not</em> size of the unscaled height field.</p>

@@ Line 33: / Line 33: @@
    exr | gif | hdr | iff | jpeg | pgm | png | pot | ppm | sys | tga | tiff
 HF_FUNCTION:
-   function FieldResolution_X, FieldResolution_Y ( UserDefined_Function )
+   function FieldResolution_X, FieldResolution_Y { UserDefined_Function }
 HF_MODIFIER:
    smooth & water_level Level

@@ Line 35: / Line 35: @@
    function FieldResolution_X, FieldResolution_Y ( UserDefined_Function )
 HF_MODIFIER:
-   hierarchy [Boolean]  |
+  smooth & water_level Level
-  smooth               |
+   hierarchy [Boolean]
 </pre>

← Older revision	Revision as of 18:09, 17 July 2012
(No difference)

@@ Line 109: / Line 109: @@
 paint programs for creating TGA image files they will not be of much use for
 creating the special 16 bit TGA files used by POV-Ray (see below and
-[[Reference:Global_Settings#HF_Gray_16|HF_Gray_16]] for more details).</p>
+[[Reference:Global Settings#HF_Gray_16|HF_Gray_16]] for more details).</p>
 <p>
 In an image file that uses a color palette, like GIF, the color number is the